Fixed Travis errors.

src/Security/Voter/LogEntryVoter.php

@@ -66,6 +66,8 @@ class LogEntryVoter extends ExtendedVoter
 
             return $this->resolver->inherit($user, 'system', 'show_logs') ?? false;
         }
+
+        return false;
     }
 
     protected function supports($attribute, $subject)

src/Security/Voter/OrderdetailVoter.php

@@ -53,5 +53,7 @@ class OrderdetailVoter extends ExtendedVoter
                 $this->resolver->listOperationsForPermission('parts_orderdetails')
             ), true);
         }
+
+        return false;
     }
 }

src/Security/Voter/PartLotVoter.php

@@ -52,5 +52,7 @@ class PartLotVoter extends ExtendedVoter
                 $this->resolver->listOperationsForPermission('parts_lots')
             ), true);
         }
+
+        return false;
     }
 }

src/Security/Voter/PricedetailVoter.php

@@ -53,5 +53,7 @@ class PricedetailVoter extends ExtendedVoter
                 $this->resolver->listOperationsForPermission('parts_prices')
             ), true);
         }
+
+        return false;
     }
 }